2. QUTE’98 Workshop Heidelberg, 14-15 October 1998 MPEG-4 Approach to QoS Reinhard Baier, GMD FOKUS, DT Guido Franceschini, CSELT, IT

3. QUTE’98 Workshop Heidelberg, 14-15 October 1998 What’s MPEG-4? ISO/IEC 14496 - Information Technology - Generic Coding of Audio-Visual Object 14496-1: Systems 14496-2: Visual 14496-3: Audio 14496-4: Conformance 14496-5: Reference Software 14496-6: DMIF

4. QUTE’98 Workshop Heidelberg, 14-15 October 1998 2D background 3D furniture voice video object AV presentation MPEG-4 - A scene

5. QUTE’98 Workshop Heidelberg, 14-15 October 1998 scene personaudiovisual presentation 2D backgroundfurniture globedeskvoicevideo MPEG-4 - A scene description

6. QUTE’98 Workshop Heidelberg, 14-15 October 1998 What’s DMIF? Delivery Multimedia Information Framework DMIF is part 6 of MPEG-4 DMIF specifies the Delivery Layer of MPEG-4

7. QUTE’98 Workshop Heidelberg, 14-15 October 1998 Why DMIF? too many delivery technologies, each with its own peculiarities no consolidated solution for real time multimedia streaming at certain QoS different APIs for different environments (Local Files, Broadcast sources, Interactive servers through a variety of transports) difficulties for network operators in defining meaningful billing policies (e.g. the “flat” Internet)

8. QUTE’98 Workshop Heidelberg, 14-15 October 1998 DMIF goals Favour the development of multimedia application with QoS requirements Hide the delivery technology details to the DMIF User Make optimal usage of network resources, given application QoS constraints Allow Network Operators to monitor resources being consumed in a single session, to allow meaningful billing policies Ensure interoperability between end-systems

9. QUTE’98 Workshop Heidelberg, 14-15 October 1998 The DMIF approach

10. QUTE’98 Workshop Heidelberg, 14-15 October 1998 The generic MPEG-4 architecture Delivery Layer ESI DAI Systems Layer Compression Layermedia related delivery related

11. QUTE’98 Workshop Heidelberg, 14-15 October 1998 DMIF communication architecture (1) Local App DAI Broadcast source Local Storage Network Remote App DAI

12. QUTE’98 Workshop Heidelberg, 14-15 October 1998 Local App DAI DMIF communication architecture (2) DMIF Filter Local DMIF for Broadcast Remote DMIF (emulated) Remote App. (emulated) Broadcast source

13. QUTE’98 Workshop Heidelberg, 14-15 October 1998 Local App DAI DMIF communication architecture (3) DMIF Filter Local DMIF for Local Files Remote DMIF (emulated) Remote App. (emulated) Local Storage

14. QUTE’98 Workshop Heidelberg, 14-15 October 1998 Local App DAI DMIF communication architecture (4) DMIF Filter Local DMIF for Remote srv DNI Sig map Network Sig map Remote DMIF (Real) Remote App DNIDAI Local DMIF for Broadcast Remote DMIF (emulated) Remote App. (emulated) Broadcast source Local DMIF for Local Files Remote DMIF (emulated) Remote App. (emulated) Local Storage

15. QUTE’98 Workshop Heidelberg, 14-15 October 1998 DMIF URLs Still under debate Requirements are: –to represent the location of a Service –to localize the Service on a variety of delivery technologies, including local files, MPEG-2 broadcast, IP and ATM networks –to represent any kind of address –to identify the control protocol to be used (including Intelligent Networks ?)

16. QUTE’98 Workshop Heidelberg, 14-15 October 1998 QoS in DMIF QoS “media” metrics: used by the application when requesting a channel QoS “transport” metrics: a generic network centric translation of the above QoS “network” (specific) metrics: the final set of metrics used in the native network signaling

17. QUTE’98 Workshop Heidelberg, 14-15 October 1998 Advantages for Developers they may write the application just once; then, by simply plugging in more DMIF instances and by feeding the application with different URLs, the application would run on other delivery technologies. they can begin to invest in commercial multimedia applications with the assurance that their investment will not be made obsolete by new delivery technologies.

18. QUTE’98 Workshop Heidelberg, 14-15 October 1998 Advantages for Network Operators the model allows for meaningful and flexible billing policies in presence of QoS it also enables the effective exploitation of Intelligent Networks, by plugging in an appropriate and proprietary DMIF instance

19. QUTE’98 Workshop Heidelberg, 14-15 October 1998 Conclusion The DMIF model would benefit many players of the multimedia industry, and provides solutions for yet unsolved issues like: –meaningful billing policies –permanence of multimedia application in the presence of new delivery technologies –QoS management.